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在Python中,獲取數(shù)據(jù)的方式主要取決于數(shù)據(jù)的存儲方式和來源,以下是一些常見的數(shù)據(jù)獲取方法:

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1、從文件中讀取數(shù)據(jù)
1.1 從文本文件中讀取數(shù)據(jù)
“`python
with open(‘file.txt’, ‘r’) as file:
data = file.read()
“`
1.2 從CSV文件中讀取數(shù)據(jù)
“`python
import csv
with open(‘file.csv’, ‘r’) as file:
reader = csv.reader(file)
for row in reader:
print(row)
“`
1.3 從JSON文件中讀取數(shù)據(jù)
“`python
import json
with open(‘file.json’, ‘r’) as file:
data = json.load(file)
“`
2、從網(wǎng)絡(luò)獲取數(shù)據(jù)
2.1 使用requests庫獲取網(wǎng)頁數(shù)據(jù)
“`python
import requests
response = requests.get(‘https://www.example.com’)
data = response.text
“`
2.2 使用BeautifulSoup庫解析網(wǎng)頁數(shù)據(jù)
“`python
from bs4 import BeautifulSoup
import requests
response = requests.get(‘https://www.example.com’)
soup = BeautifulSoup(response.text, ‘html.parser’)
“`
3、從數(shù)據(jù)庫獲取數(shù)據(jù)
3.1 使用sqlite3庫操作SQLite數(shù)據(jù)庫
“`python
import sqlite3
conn = sqlite3.connect(‘database.db’)
cursor = conn.cursor()
cursor.execute(‘SELECT * FROM table_name’)
data = cursor.fetchall()
conn.close()
“`
3.2 使用pymysql庫操作MySQL數(shù)據(jù)庫
“`python
import pymysql
conn = pymysql.connect(host=’localhost’, user=’username’, password=’password’, database=’database_name’)
cursor = conn.cursor()
cursor.execute(‘SELECT * FROM table_name’)
data = cursor.fetchall()
conn.close()
“`
4、從API獲取數(shù)據(jù)
4.1 使用requests庫調(diào)用RESTful API
“`python
import requests
response = requests.get(‘https://api.example.com/data’)
data = response.json()
“`
以上就是Python中獲取數(shù)據(jù)的常見方法。
網(wǎng)頁標(biāo)題:python如何獲取數(shù)據(jù)
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